/**********************************************************************
 Copyright (C) 2009 Jaakko Vuori

 This file is part of Cimer.
 For more information, see <http://code.google.com/p/cimer/>

 Cimer is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 Cimer is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with Cimer.  If not, see <http://www.gnu.org/licenses/>.
 **********************************************************************/

#include "screensaverpreventer_win.h"
#include "screensaverpreventer.h"
#include <qt_windows.h>
#include <QTimer>

const unsigned int SimulationInterval = 30000;

ScreensaverPreventerPrivate::ScreensaverPreventerPrivate(QObject* parent) :
    QObject(parent)
{
    QTimer* timer = new QTimer(this);
    timer->start(SimulationInterval);
    connect(timer, SIGNAL(timeout()), this, SLOT(simulateActivity()));
}

ScreensaverPreventerPrivate::~ScreensaverPreventerPrivate()
{
}

void ScreensaverPreventerPrivate::simulateActivity()
{
    LASTINPUTINFO lii;
    lii.cbSize = sizeof(lii);

    GetLastInputInfo(&lii);
    unsigned int idleTime = GetTickCount() - lii.dwTime;

    if (idleTime > SimulationInterval)
    {
        INPUT key;
        key.type = INPUT_KEYBOARD;
        key.ki.wVk = VK_LSHIFT;
        key.ki.dwFlags = KEYEVENTF_KEYUP;
        key.ki.time = 0;
        key.ki.wScan = 0;
        key.ki.dwExtraInfo = 0;

        SendInput(1, &key, sizeof(INPUT));
    }
}
